BoilerFaultCodesYour boiler has detected that a temperature sensor has lost physical contact with the internal pipework, meaning it can no longer monitor heat levels correctly.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Central heating NTC not connected to pipe
What causes this fault?
This fault occurs when the temperature sensor responsible for monitoring your heating water becomes physically detached from the pipe it is meant to sit on. The most common reason is a snapped or weakened metal retaining clip, though it can also be caused by excessive vibration or a loose wiring plug that has vibrated free over time.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like 19 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Glow-worm 30ci Plus is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.